Home / 28,320.62-39,078.13-15,574.32

Finding the Fourth Proportional to 28,320.62, 39,078.13 and 15,574.32

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Solution

The fourth proportional to 28,320.62, 39,078.13 and 15,574.32 is: 21,490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,320.62 : 39,078.13 = 15,574.32 : x
  2. Step 2: Convert to fraction form
    28,320.62/39,078.13 = 15,574.32/x
  3. Step 3: Cross multiply
    28,320.62x = 39,078.13 × 15,574.32
  4. Step 4: Simplify right side
    28,320.62x = 608,615,301.62
  5. Step 5: Solve for x
    x = 608,615,301.62/28,320.62
  6. Step 6: Final answer
    x = 21,490.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.